Bulk-Fitness Measurements Using Barcode Sequencing Analysis in Yeast

Area of Science:

• Genomics and Molecular Biology
• Yeast Genetics
• High-Throughput Screening

Background:

• DNA barcodes are crucial for tracking genotype frequencies in large-scale studies.
• Next-generation sequencing (NGS) technologies have enabled phenotyping of numerous strains.
• Accurate measurement of strain fitness is essential for understanding genetic contributions.

Purpose of the Study:

• To describe a method for simultaneously determining strain fitness for thousands of yeast strains.
• To leverage recent innovations to increase the precision of high-throughput phenotyping assays.
• To provide a scalable approach for genotype-phenotype association studies.

Main Methods:

• Utilized DNA barcodes for genotype frequency determination.
• Employed unique molecular identifiers (UMIs) to enhance sequencing accuracy.
• Incorporated solid-phase reverse immobilization (SPRI) beads for purification and improved precision.

Main Results:

• Successfully determined the fitness of thousands of yeast strains in a single assay.
• Demonstrated increased precision in strain fitness measurements through UMI and SPRI bead incorporation.
• Validated the scalability and accuracy of the described high-throughput phenotyping method.

Conclusions:

• The described method enables precise, large-scale determination of yeast strain fitness.
• Innovations in DNA barcoding and NGS analysis significantly advance high-throughput phenotyping capabilities.
• This approach facilitates deeper understanding of genotype-fitness relationships in yeast populations.